Patent US3830286A successfully refreshed from Google Patents.
US3830286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger core and method of fabrication thereof
Assignee: CHROMALLOY COMPRESSOR TECHNOLOGIES Corp C/O CHROMALLOY GAS TURBINE CORPORATION
•
Filing: 1973-03-29
•
Granted: 1974-08-20
•
Expires: 1993-03-29
Abstract
Abstract A heat exchanger core is constructed by assembling and joining by brazing a plurality of thin flat strips of stepped configuration into a stack with the steps thereof offset with respect to each other to provide a series of rectnagular passages or cells through the stack. An opening is then cut through the center of the stack and the inwardly projecting, cut edges of the strips at the opening are bent over into contact with each other and attached to a hub by brazing. The outer periphery of the stack is cut to a circular configuration concentric with the central opening and the outwardly projecting cut edges of the strips at the outer periphery of the stack are also bent over in overlapping relationship to each other and an outer strip band secured thereto by brazing. This provides a core having a high aspect ratio without reduction in strength.
Inventors
- 👤 D Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:45
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; B; B23; B23P; B23P15/00; B23P15/26; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/042; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T428/00; Y10T428/12; Y10T428/1234; Y10T428/12361; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
182 words
A rotary heat exchanger core comprising: a. a plurality of elongated, relatively thin strips, b. each of said strips being bent to a stepped configuration including a plurality of relatively broad flat portions extending substantially parallel to each other and a plurality of relatively narrow sections extending substantially parallel to each other and joining said relatively broad portions of said strip, c. each of said narrow sections of each of said strips extending angularly between adjacent of said broad portions of said strip, d. each said narrow section displacing adjacent of said broad portions away from each other along the direction of said narrow section, e. said strips being stacked in offset relationship to each other with said relatively broad portions of each strip extending substantially parallel and in contact with said relatively broad portions of other strips and said relatively narrow sections of each strip extending in spaced, substantially parallel relationship to said relatively narrow sections of the other strips, f. means interconnecting said strips at the areas of contact therebetween, and g. thE periphery of the core being substantially circular.
Claim 2
Dependent Claim
182 words
A rotary heat exchanger core comprising: a. a plurality of elongated, relatively thin strips, b. each of said strips being bent to a stepped configuration including a plurality of relatively broad flat portions extending substantially parallel to each other and a plurality of relatively narrow sections extending substantially parallel to each other and joining said relatively broad portions of said strip, c. each of said narrow sections of each of said strips extending angularly between adjacent of said broad portions of said strip, d. each said narrow section displacing adjacent of said broad portions away from each other along the direction of said narrow section, e. said strips being stacked in offset relationship to each other with said relatively broad portions of each strip extending substantially parallel and in contact with said relatively broad portions of other strips and said relatively narrow sections of each strip extending in spaced, substantially parallel relationship to said relatively narrow sections of the other strips, f. means interconnecting said strips at the areas of contact therebetween, and g. thE periphery of the core being substantially circular.
Claim 3
Dependent Claim
25 words
The core of claim 1 wherein: a. said spacing between said adjacent relatively narrow sections is greater than the depth of said relatively narrow sections.
Claim 4
Dependent Claim
21 words
The heat exchanger core of claim 1 further comprising: a. means defining an opening through said joined strips extending transversely thereof.
Claim 5
Dependent Claim
22 words
The heat exchanger core of claim 3 wherein: a. said joined strips have an outer periphery substantially concentric with said opening therethrough.
Claim 6
Dependent Claim
31 words
The heat exchanger core of claim 3 wherein: a. portions of said strips at said opening are bent over about the periphery of said opening into overlapping relationship with each other.
Claim 7
Dependent Claim
28 words
The core of claim 5 further comprising: a. a hub attached to said bent over portions of said strips about the periphery of said opening through said stack.
Claim 8
Dependent Claim
30 words
The heat exchanger core of claim 4 wherein: a. portions of said strips at said outer periphery are bent over into overlapping relationship with each other about said outer periphery.
Claim 9
Dependent Claim
28 words
The core of claim 7 further comprising: a. an outer strip band attached to said bent over portions of said strips about said outer periphery of said stack.
Claim 10
Dependent Claim
165 words
A rotary heat exchanger core comprising: a. a plurality of elongated, relatively thin strips, b. each of said strips being bent to a stepped configuration including a plurality of relatively broad flat portions extending substantially parallel to each other and a plurality of relatively narrow sections extending substantially parallel to each other and joining said relatively broad portions, c. said strips being stacked in offset, non nesting relationship to each other with said relatively broad portions of each said strip extending substantially parallel to said relatively broad portions of the other strips and said relatively narrow sections of each strip extending in spaced, substantially parallel relationship to said relatively narrow sections of the other strips, d. the spacing between adjacent relatively narrow sections of adjacent strips being less than the width of said relatively broad portions of said strips to provide areas of contact therebetween, e. means interconnecting said strips at said areas of contact, and f. the periphery of the core being substantially circular.
Claim 11
Dependent Claim
165 words
A rotary heat exchanger core comprising: a. a plurality of elongated, relatively thin strips, b. each of said strips being bent to a stepped configuration including a plurality of relatively broad flat portions extending substantially parallel to each other and a plurality of relatively narrow sections extending substantially parallel to each other and joining said relatively broad portions, c. said strips being stacked in offset, non nesting relationship to each other with said relatively broad portions of each said strip extending substantially parallel to said relatively broad portions of the other strips and said relatively narrow sections of each strip extending in spaced, substantially parallel relationship to said relatively narrow sections of the other strips, d. the spacing between adjacent relatively narrow sections of adjacent strips being less than the width of said relatively broad portions of said strips to provide areas of contact therebetween, e. means interconnecting said strips at said areas of contact, and f. the periphery of the core being substantially circular.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |